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This works just fine when I' m creating zip file, but when I create MemoryStream that will be written to database I get some errors, the code goes something like this:

if (progDir.Exists)
 {
        FileInfo[ flist = progDir.GetFiles();
        MemoryStream strp = new MemoryStream();
        int duzinap;
        DateTime vreme;
        using (ZipOutputStream zipOS = new ZipOutputStream(strp))
         {
              ZipEntry zipEntryPrint = new ZipEntry("print/");
              zipOS.PutNextEntry(zipEntryPrint);
              foreach (FileInfo f in flist)
              {
                   ZipEntry zipEntry = new ZipEntry("print/" + f.Name);
                   zipOS.PutNextEntry(zipEntry);
                   FileStream fsp = new FileStream(f.FullName, FileMode.Open);
                   BinaryReader brp = new BinaryReader(fsp);
                   byte[ binp = brp.ReadBytes(Convert.ToInt32(fsp.Length));
                   zipOS.Write(binp, 0, Convert.ToInt32(fsp.Length));
                   fsp.Close();
                   brp.Close();
              }
              vreme = DateTime.Now;
              duzinap =Convert.ToInt32(strp.Length); 

        }

        byte[ binpz =strp.ToArray();

        and this binpz is the varbinary(MAX) that gets into database, all other files ( single program files that I zip, convert ot byte array and store to database have good format, but this zipped dir is unreadable)

So what are the errors/symptoms?

Have you looked at the data to see whats wrong?

Cheers, -jr-

     I don't get any errors at run time, but when I try to open the file I downloaded from database  I get error message: The compressed(zipped) folder is invalid or corrupted, now if I save output in a zip file, and than serialize the file to database all is well, and that is just what I did, but it's not exactly pretty code. 

PS. You asked have I looked at the data to see whats wrong.. That is beyond my level of expertise, I don't really know all that much about file formats etc.(If you have time or inclination to take a look at the file I'll be happy to send it and very grateful for your assistance)   Here is the modified code that works:

if (progDir.Exists)
 {
      FileInfo[ flist = progDir.GetFiles();
      DateTime vreme;
      if (File.Exists("C:\\servis\\win\\bamv\\print.zip")) File.Delete("C:\\servis\\win\\bamv\\print.zip");
      ZipOutputStream zipOS = new ZipOutputStream(File.Create("C:\\servis\\win\\bamv\\print.zip"));
      zipOS.SetLevel(9);
      zipOS.UseZip64 = 0;

      ZipEntry zipEntryPrint = new ZipEntry("print/");
      zipOS.PutNextEntry(zipEntryPrint);

      foreach (FileInfo f in flist)
      {
           ZipEntry zipEntry = new ZipEntry("print/" + f.Name);
           zipOS.PutNextEntry(zipEntry);
           FileStream fsp = new FileStream(f.FullName, FileMode.Open);
           BinaryReader brp = new BinaryReader(fsp);
           byte[ binp = brp.ReadBytes(Convert.ToInt32(fsp.Length));
           zipOS.Write(binp, 0, Convert.ToInt32(fsp.Length));
            fsp.Close();
            brp.Close();
      }
      vreme = DateTime.Now;
      zipOS.Finish();
      zipOS.Close();
     

      FileStream fspz = new FileStream("C:\\servis\\win\\bamv\\print.zip", FileMode.Open);
      BinaryReader brpz = new BinaryReader(fspz);
      byte[ binpz = brpz.ReadBytes(Convert.ToInt32(fspz.Length));
      int duzina = Convert.ToInt32(fspz.Length);

and than binpz goes to database.
                                    

Hi,

Take the output binary data exactly as your code generates and then write it to a file which archivers powerarchiver, winzip et al can be used to look at/test.

You are already doing this kind of thing when you download from what you say.

You can try and get at the innards with a tool like AEX (http://www.geocities.com/licamft) as well once you have a file.   This can give you an insight into whats going on

If need be we can look at the output of that to see whats wrong.

 Thought: I would check that you are writing exactly whats read in terms of number of bytes rather than assuming all the data has been read.this has been a problem in the past.  I havent had a lot of time to look atyour code sorry. hth, -jr-